senior java software engineer jobs in London

White Collar Factory (95009), United Kingdom, London, LondonSenior Software EngineerJob Title: Senior Software EngineerLocation: London - HybridWorking Pattern: 3 days in-office (Tuesday-Thursday) and 2 days remote.Our MissionWe’re on a mission to be a force for good in lending. Throughout our almost 30-year history, we’ve consistently been recognised as...

Senior Software Engineer, Custody ServicesLondon, UKJoin us in building the future of finance.Our mission is to democratize finance for all. An estimated $124 trillion of assets will be inherited by younger generations in the next two decades. The largest transfer of wealth in human history. If you're ready to be at the epicenter of this historic cultural...

London (4 days onsite, 1 remote) We're working with a fast-growing AI Engineering team based in London on a Senior Software Engineer hire. The team has a genuine startup culture, small, focused, high ownership, backed by the scale and resources of a major global organisation. They build AI-driven technology that has measurable real-world impact on how...

A fast-growing, mission-driven tech scale-up is hiring a Senior Backend Engineer to help build and scale the core software platform powering their technology.The company is developing tools that help transform agriculture globally. Their platform helps farmers make better decisions that improve yields while reducing environmental impact. It is a genuine tech...

What we’re all about.Do you ever have the urge to do things better than the last time? We do. And it’s this urge that drives us every day. Our environment of discovery and innovation means we’re able to create deep and valuable relationships with our clients to create real change for them and their industries. It’s what got us here – and it’s...

Senior Software Engineer (Java/Angular) Catapult is building the future of sports performance technology, with a mission to Unleash the Potential of every athlete and team on earth. We don't just work in the sporting industry; we are actively changing it. Since 2006, our solutions have been leading the way in sports performance software, science, and data,...

A Bit About Us At nudge we believe people need to be in control of their finances. nudge puts you in control of your money. Combining behavioural psychology, data, and personalised education, our financial wellness benefit empowers people to develop their financial skills and knowledge. Job Title: Senior Software Engineer Location: London Victoria,...

Help us use technology to make a big green dent in the universe! Kraken powers some of the most innovative global developments in energy. We create the technology that redefines utilities and unlocks a new energy system of the future. By optimising renewable generation, building a more intelligent grid, and empowering utilities to deliver an exceptional...

At Recycleye we are revolutionising Recycling. Our ground-breaking AI powers robots and optical sorters making waste sorting faster, cleaner and more profitable. With our advanced tech, the previously unsortable can now be sorted efficiently and effectively. Founded in 2019, we have grown rapidly ever since, with installations at leading waste management...

CHAOS Industries is redefining modern defense with a multi-product portfolio that gives the ultimate advantage—domain dominance. The company's products are powered by Coherent Distributed Networks (CDN™), empowering warfighters, commercial air operators, and border protection teams to act faster, adapt rapidly, and stay ahead of evolving threats. CHAOS...

About our TeamOur team is a Shared Services team that provides API Platform capabilities to all of Elsevier. API teams can onboard APIs, manage their lifecycles and monitor usage. For public APIs, customers can create credentials through the self-service developer portal. The Platform also offers AI Gateways, enabling API teams to onboard MCP servers and...

Software engineer – Energy Tech | £90k | Hybrid London (1 day a week) We’re looking for Software engineers to join a small, elite team building the future of home energy management. This isn’t a job for feature‑chasers or those who want to hide behind tickets, you’ll take full ownership of the code you write, from design to deployment, across...

Build the engine room of a payments platform that actually understands money. Most payments companies are wrappers. Money goes in, money comes out, and nobody can tell you why a particular merchant got paid the amount they did, against which rule, on which day. Our client can. That is the whole product. We're partnering on a search for a well funded London...

Company Overview Metrea delivers effects-as-a-service to national security partners across five domains and more than a dozen mission areas. These include airborne ISR, electronic warfare, secure communications, aerial refueling, special air missions, aerial firefighting, and advanced simulation. We own the whole stack: designing, building, and operating...

Senior Java Engineer: 6 month contract. Outside IR35, 2 days a week in Manchester. I'm looking for a senior Java Engineer to join a small team working on building a load of new backend services for an existing platform. The role requires someone who can be in office a couple of days a week to collaborate with the small engineering and product team. What...

Catapult is building the future of sports performance technology, with a mission to Unleash the Potential of every athlete and team on earth. We don't just work in the sporting industry; we are actively changing it. Since 2006, our solutions have been leading the way in sports performance software, science, and data, in a world where 1% can literally mean...

Senior Software Engineer LCP Delta is working to enable the energy transition through a variety of offerings. One of these offerings is the tech enablement of vast datasets to inform key decision makers on energy market trends and to provide valuable insights. We have developed a suite of technology products through our Enact and Spark platforms, from...

Senior Software EngineerLocation: London, UK (Canary Wharf) Duration: Sep 2026 – June 2027 On-site Expectation: Up to 5 days per week in officeBrief about the Team & Fractal: Fractal Analytics is Leading Fortune 500 companies leverage Big Data, analytics, and technology to drive smarter, faster and more accurate decisions in every aspect of their business....

Remote | Central London office (few trips a year) We’re working with a growing technology business looking to hire an experienced Senior C# Software Engineer to join its software engineering team. This is a hands-on development role for someone with strong commercial software engineering experience in C#/.NET, with experience building cloud-native,...

Senior Software Engineer - AI Start-up - London - In-Office - Up to £200k Base + Equity We’re supporting a category‑leading AI organisation building next‑generation conversational agents used by major global brands. Their platform powers intelligent, human‑like interactions across chat, email and voice, resolving millions of customer queries in real...